Electromagnetic devices

ABSTRACT

An electromagnetic device comprising a solenoid embedded within a moulded body and an associated armature. The device is adapted to be attached to a valve or other part which is to be actuated by the armature and incorporates a resilient means at its end adjacent the said part. Moreover, for attaching the device there is provided a surrounding and relatively slidable member adapted to be connected to the valve or other part and having internal shoulders coacting with complementary shoulders formed on the body.

United States Patent Benson 51 Feb. 1,1972

[54] ELECTROMAGNETIC DEVICES [72] Inventor: Reginald B. G. Benson, 81 Cotes Road,

Barrow-on-Soar, Leigesterslfi, England [22] Filed: July 10, 1970 [21] Appl. N0.: 53,916

[52] US. Cl ..335/257, 335/260, 335/278 [51] Int. Cl. ..H0lf 7/08 [58] Field of Search ..335/248, 255, 278, 260, 257, 335/277 [56] References Cited UNITED STATES PATENTS 3,331,042 7/1967 Erickson et al ..335/260 3,530,572 9/1970 Conrath ..335/257 X FOREIGN PATENTS OR APPLICATIONS 560,326 9/1957 Belgium ..335/278 Primary Examiner-G. Harris AttorneyHolma.n and Stern [5 7] ABSTRACT An electromagnetic device comprising a solenoid embedded within a moulded body and an associated armature. The device is adapted to be attached to a valve or other part which is to be actuated by the armature and incorporates a resilient means at its end adjacent the said part. Moreover, for attaching the device there is provided a surrounding and relatively slidable member adapted to be connected to the valve or other part and having internal shoulders eoacting with complementary shoulders formed on the body.

2 Claims, 3 Drawing Figures PATENIED FEB 1 1972 FIGE. K INVENTO;

I 4 MM/ '14 mm ATTORNEYS ELECTROMAGNETIC DEVICES The object of this invention is to provide an electromagnetic device in a simple and convenient form.

An electromagnetic device according to the invention comprises in combination a core and associated winding embedded within a moulded body of insulating material, said body defining a peripheral shoulder or shoulders at or adjacent one end which is adapted to be clamped against a part on which the device is to be mounted, a mounting member adapted to be secured to said part, said member being slidably engageable around the body and having an internal shoulder or shoulders complementary to, and engageable with the shoulders on the body, resilient means at the end of the body to be clamped against said part, an armature slidable within the core, and a detachable cap connected to the end of the body remote from said resilient means to enclose said armature.

In the accompanying drawings FIG. 1 is a sectional view of an example of the invention,

FIG. 2 is an end view of FIG. 1, and

FIG. 3 is a fragmentary view of a modification.

Referring to the drawings, there is provided a moulded body in which is embedded the laminated core 11 and the coil 12 of a solenoid. The body 10 is formed from an insulating material such for example, as an epoxy resin, which will not be adversely affected by the heat generated in the coil 12. Moreover, near one end of the body 10 which is to be clamped against a part such as a fluid controlling valve on which the solenoid is to be mounted, the body is provided with a plurality of integral peripheral projections 13 which result in the formation of shoulders 14 presented towards the opposite end of the body. As will be seen from the drawings, the body 10 has a cross section which is square but is cut away upon a radius at each corner. Moreover, the body tapers uniformly from the end incorporating the projections 13 towards its opposite end.

Secured as by screws to the narrower end of the body 10 is a detachable moulded cap 15 having a cross section similar to that of the body and having a taper which is a continuation of the taper of the body. The cap 15 accommodates the head of a substantially T-shaped laminated armature 16, the stem of which is slidable within the body 10. Moreover, between the cap 15 and the body 10 is a gasket 17 for preventing the ingress of moisture or dirt.

Secured by adhesive to the end of the body 10 which is to be clamped against the valve or other part, is a rubber or other resilient gasket 18, and for clamping the body against the part there is provided a mounting member 19 which can be slid onto the body 10. The mounting member 19 has a central aperture having a cross section similar to the cross section of the wider end of the body 10, and is provided with internal shoulders 20 which are complementary to, and engageable with the shoulders 14. The member 19 also has holes 21 near its corners for the reception of screws whereby it can be secured to the valve or other part.

The registering holes 22 in the core II and body 10 and the hole 23 in the gasket 18 permit the armature 16 to contact a rod which extends from the valve and provides a means for actuating the valve. Moreover, the gasket 18 may incorporate a hole 24 through which the leads to the coil 12 pass.

When the device is secured to a valve or other part as described, shock loads resulting from the head of the armature l6 striking the core 11' will be cushioned by the resilience of the gasket 18 which will allow the body 10 to move axially whilst the shoulders 14 separate from the shoulders 20. If desired, (as shown in FIG. 3), a resilient gasket 25 may be interposed between the shoulders 14 and 20 to cushion the reaction forces.

By a construction as above described, a device can be manufactured which will minimize the shock loads transmitted to the part upon which it is mounted, will prevent the ingress of moisture or dirt to the movable parts of the device, and which is compact and simple to manufacture and mount.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. An electromagnetic device comprising in combinatlon a core and associated winding embedded within a moulded body of insulating material, said body defining a peripheral shoulder adjacent one end which is adapted to be clamped against a part on which the device is to be mounted, a mounting member adapted to be secured to said part, said member being slidably engageable around the body and having an internal shoulder complementary to, and engageable with the shoulder on the body, resilient means at the end of the body to be clamped against said part, an armature slidable within the core, and a detachable cap connected to the end of the body remote from said resilient means to enclose said armature.

2. An electromagnetic device as claimed in claim I including a resilient gasket interposed between the complementary shoulders on the body and the mounting member respectively. 

1. An electromagnetic device comprising in combination a core and associated winding embedded within a moulded body of insulating material, said body defining a peripheral shoulder adjacent one end which is adapted to be clamped against a part on which the device is to be mounted, a mounting member adapted to be secured to said part, said member being slidably engageable around the body and having an internal shoulder complementary to, and engageable with the shoulder on the body, resilient means at the end of the body to be clamped against said part, an armature slidable within the core, and a detachable cap connected to the end of the body remote from said resilient means to enclose said armature.
 2. An electromagnetic device as claimed in claim 1 including a resilient gasket interposed between the complementary shoulders on the body and the mounting member respectively. 